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The BD Diesel 1064444SM TowMaster 4R100 Transmission & Converter Package is the ultimate drivetrain upgrade for 1999–2003 Ford Super Duty 4WD trucks with the legendary 7.3L Power Stroke engine. This heavy-duty transmission and torque converter combo is engineered to outlast and outperform stock components, delivering stronger shifts, increased cooling, and improved towing capability.
Packed with internal upgrades, BD's 4R100 transmission includes a recalibrated accumulator body, added lubrication circuits, increased clutch counts, and a fully rollerized geartrain. The BD ProForce torque converter improves low-RPM response and efficiency while reducing heat and enhancing fuel economy—making it perfect for street, towing, and work truck applications.
💰 Requires $1,500 Refundable Core Charge
⏱️ Estimated Install Time: 7 Hours
⚠️ Excursion models must reuse OEM-style pan due to crossmember clearance
+6qt BD Deep Sump Aluminum Pan for added fluid & cooling
Recalibrated accumulator body for firmer, quicker shifts
Full shift kit with line mod valve increases converter pressure
Added lubrication to OD planet, output shaft, and intermediate shaft
Machined center support & reworked front pump
Drilled/tapped feeds prevent internal leakage at the case
Upgraded Clutch Counts:
Forward: 5 (↑ 25%)
Overdrive: 4 (↑ 33%)
Intermediate: 4 (↑ 33%)
Low Reverse: 7 (↑ 17%)
Coast Clutch: 2
Direct Clutch: 5
Fully rollerized geartrain for reduced friction
Upgraded OD snap ring
Dyno-tested for quality assurance
Auxiliary full-flow frame-mounted filter kit (1990–2003)
Torque-multiplying cast aluminum stator
Lower RPM response vs. stock
Furnace-brazed turbine fins
Stamp-forged steel front cover
Improved fuel efficiency & reduced heat generation
1999–2003 Ford F-250 Super Duty 7.3L Power Stroke 4WD (4R100 Transmission)
1999–2003 Ford F-350 Super Duty 7.3L Power Stroke 4WD (4R100 Transmission)
2000–2003 Ford Excursion 7.3L Power Stroke 4WD (See pan note below)
❌ Will not fit applications requiring PTO
⚠️ Excursion models must use OEM-style transmission pan
⚠️ Remote filter required for inspection w/ cooler flow GPM at cooler outlet
BD TowMaster 4R100 Transmission (Assembled & Dyno-Tested)
ProForce Torque Converter
BD Heavy-Duty Deep Sump Pan (Excursion uses OEM pan)
Shift Kit with Line Mod Valve
Auxiliary Frame-Mounted Filter Kit
Upgraded Clutch Packs, Valve Body, Lubrication Circuitry
36-Month / 150,000-Mile Parts Warranty
12-Month / 24,000-Mile Labor Warranty
The TowMaster Series from BD Diesel is trusted by diesel enthusiasts and work truck owners for one reason: it gets the job done. This 4R100 build is packed with long-term durability upgrades, cooler-running hardware, and crisp-shifting engineering—all backed by industry-leading warranties and real-world performance testing.
Whether you're hauling a trailer, moving gear, or just want your 7.3L to drive like new again, BD builds it better.
We are open Monday-Friday from 8am-6pm EST
Yes, customers located in and around the the Piedmont area are welcome to pick up their items from our retail location during normal business hours. Our address is:
Elite Race Fab
1514 Holbrook St Suite D-F
Greensboro, NC 27403
Elite Race Fab offers free ground shipping & handling to our retail customers within the lower 48 contiguous United States on most orders totaling $159.99 and higher, when the item being purchased is not a Freight/LTL item! Orders under $159.99 will be subject to a nominal $13.99 Flat shipping charge. Some exceptions and/or exclusions apply, in those scenarios you will be advised of any additional charges in the item details/description stating shipping exclussions/freight shipping required etc.
In regards to expedited and international shipping each order will need to be quoted on a case by case basis. You can obtain a quote two ways:
- From your shopping cart select "Request a Quote" prior to placing your order. We will review your proposed order and promptly respond with shipping estimates.
- Complete your order ahead of time indicating either expedited or international shipping during the checkout process. We will promptly determine shipping rates for your order and email you for approval and additional payment.
-Give us a call and we can ensure your item is shipped right then, to ensure you have it in time for your deadline.
We have been committed to offering all of our customers the lowest pricing throughout our website day in and day out. We value your business so much that we go a step further than our competitors. We use a third party software that proactively monitors all our competitor's websites/pricing so that we can make adjustments accordingly if needed to have the lowest prices. Thats right, no need to spend hours searching for the lowest prices, as ours will be the lowest.
As far as price matching, we dont want to write a check we cant cash, but we certainly want to earn your business. With that said, we will go above and beyond to match our competitor's pricing when it is needed. Simply email us, click the live contact button, or give us a call and be sure to have a link to our competitor's site and please factor in any shipping and handling their website will be charging. We will then ensure you get the lowest price, and either match or beat their pricing.
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